331228 has 12 divisors (see below), whose sum is σ = 613872. Its totient is φ = 155840.

The previous prime is 331217. The next prime is 331231. The reversal of 331228 is 822133.

It is a happy number.

331228 is nontrivially palindromic in base 7.

It is a nialpdrome in base 9.

It is a congruent number.

It is an unprimeable number.

331228 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2368 + ... + 2503.

It is an arithmetic number, because the mean of its divisors is an integer number (51156).

2³³¹²²⁸ is an apocalyptic number.

It is an amenable number.

331228 is a deficient number, since it is larger than the sum of its proper divisors (282644).

331228 is a wasteful number, since it uses less digits than its factorization.

331228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4892 (or 4890 counting only the distinct ones).

The product of its digits is 288, while the sum is 19.

The square root of 331228 is about 575.5241089650. The cubic root of 331228 is about 69.1898433644.

The spelling of 331228 in words is "three hundred thirty-one thousand, two hundred twenty-eight".